The bar graph shows the average cost of tuition and fees at private four-year colleges in...

The bar graph shows the average cost of tuition and fees at private four-year colleges in the United States.

Average Cost of Tuition and Fees at Private Four-Year United States Colleges

Source: The College Board

The formula

models the average cost of tuition and fees, T, at private U.S. colleges for the school year ending x years after 2000. Use this information to solve.

a. Use the formula to find the average cost of tuition and fees at private U.S. colleges for the school year ending in 2010.

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b. By how much does the formula underestimate or overestimate the actual cost shown by the graph for the school year ending in 2010?

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c. Use the formula to project the average cost of tuition and fees at private U.S. colleges for the school year ending in 2013.